RFR: JDK-8142475: Remove TraceParallelOldGCTasks

Thomas Schatzl thomas.schatzl at oracle.com
Wed Nov 11 14:00:08 UTC 2015


Hi,

On Wed, 2015-11-11 at 13:46 +0100, Bengt Rutisson wrote:
> Hi all,
> 
> Could I have a couple of reviews for this change?
> 
> https://bugs.openjdk.java.net/browse/JDK-8142475
> http://cr.openjdk.java.net/~brutisso/8142475/webrev.00/
> 
> The ParallelGC has logging in debug builds (even if it is guarded by a 
> product flag) that logs messages for each task.
> 
> The output from this logging i pretty scrambled and hard to make sense 
> of. Each thread prints the task it is currently working on. There is no 
> correlation between threads and there is no summary to add times for 
> related tasks.
> 
> This type of per thread information is hard to make useful in a log 
> file. It would be much better to add trace events for this information.
> 
> Rather than trying to fix this logging we should remove it. If it turns 
> out that it is needed in the future we should add trace events to track it.

  removal is fine with me. Looks good.

Thomas




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